JPH11120383A - Cad/cae device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently use conventional information among information regarding a shape of a model. SOLUTION: When the information regarding the shape of an object to be analyzed and an analyzing condition is inputted in an analysis processor 10 from a keyboard 14, a finite element model is generated based on the information inputted in the analysis processor 10. After that, a request to change the shape for the finite element model is inputted from the keyboard 14 and when a point of change regarding the finite element model and its contents are specified, the shape of the finite element model is changed by processings at a shape changing part 20 and a shape processing part 22. Specifically, only the vicinity of a newly changed part in the model is initialized, other parts are left as they are and a processing to newly divide the initialized part into plural finite elements is performed. And a motion of the object to be analyzed is analyzed by an analysis processing part 26 based on the newly generated finite element model and an analyzing result is displayed on a screen of a display part 12 by the processing at an analyzing result display part 28.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CAD / CAE apparatus, and more particularly, to a CAD (Computer Aided Design),
The present invention relates to a CAD / CAE apparatus suitable for performing modeling and analysis of an analysis target in a so-called computer-aided design / production automation system such as a CAE (Computer Aided Engineering) system.

[0002]

2. Description of the Related Art Conventionally, when a structure is analyzed by a computer, an analysis model is created from a shape model to be analyzed on a CAD. A CAD that has been developed to reduce the number of trial productions of a product is provided with a database of shape models. By storing the shape models in the database, the models once made can be reused. If the dimensions are different for the same model, the different parts are corrected and the existing data is used effectively.

[0003] However, if the dimensions are different at this time, the model is created again by operating each component. This is a complicated and repetitive task for designers when dealing with similar products.

[0004] In order to avoid this repetition, studies on the shape characteristics of CAD have been advanced. What are shape characteristics?
This is a characteristic obtained by giving some characteristic to a component of the shape model and performing a certain operation on the shape model by the user, and the component having the characteristic is changed according to the operation. For example, a shape characteristic of a screw hole is input to a certain component. Thereafter, when the user changes the dimensions of the screw hole, the geometric data of the component having the shape characteristic of the screw hole and the component including the component are changed.

[0005] Regarding the shape characteristics, three-dimensional C-type is described in the September 1991 issue of Nikkei CG published by Nikkei Inc.
It is described in AD.

When handling the same product, a special CAD / CA
E is made. It is important to make the dedicated CAD / CAE easy to use for each product. At present, components and material constants of products are prepared in a database using general-purpose CAD / CAE. When the components of the product are determined, the components are selected from the database, and a shape model is created using the components. In this case, it is necessary to save past data, and the data amount becomes enormous. This can be tedious when working with poor performance or low memory, and can be annoying when working. In addition, due to the monotonous work, if care is not taken, data errors are likely to occur.

Conventionally, various solutions have been studied for these problems. One of the researches is a zooming analysis as a high-precision analysis that can be performed in a short time with a small memory. In this analysis, the whole shape to be analyzed (whole model) is analyzed by coarse element division (whole analysis) so as to be completed in a short time. Next, a model (detailed model) of the portion of interest is created from the analysis result and mapped to the boundary surface. This is a method of performing an analysis (detailed analysis) by performing a fine element division on the detailed model. The zooming analysis is a work in which the user consistently performs from the creation of the entire model to the evaluation of the detailed analysis result.

As a zooming analysis method, there is ANSYS of Swanson Analysis Systems, Inc. as a commercially available system.

As another high-precision analysis, one of the repetitive structures is modeled in detail with respect to a shape whose analysis target is a repetitive structure (detail model). The detailed model is analyzed by giving boundary conditions, attributes, and the like to the detailed model (detailed analysis), and the analysis result is used as a characteristic of the repetitive structure in the entire shape to be analyzed. The shape of the analysis target having a repetitive structure is modeled as an entire model, and the detailed analysis result is input as a boundary condition to analyze the entire model. At this time, the overall model is made roughly as compared with the detailed model, and the analysis time is reduced. For example, a detailed model is made of solid elements, and an entire model is made of beams. As a result, the number of nodes in the entire shape is reduced, and the analysis time can be reduced. Finally, a method of extracting the analysis result of the portion having the largest variation in the portion having the repeating structure in the entire analysis result, inputting it to the original detailed model as a boundary condition, and performing analysis has been studied. Regarding this method, see Masaki Shiratori, “Stress Analysis and Life Evaluation of Surface Solid Parts by Influence Function Method”, Material of RC113 Research Subcommittee of the Japan Society of Mechanical Engineers (December, 1992) and Finite by JSCorbin.
element analysis for Solder Ball Connect (SBC) str
uctural design optimization (IBM Journal of Reserc
h and Development).

In order to analyze the product that the user wants to analyze,
First, a shape to be analyzed is input to a computer to generate a shape model. The shape model is converted to a finite element model, and the structure is analyzed using the finite element method. At that time, the shape model is composed of solids, shells, vertices, faces, edges, and loops, and has individual information. These six elements are called phase elements. For example, assume that there is a shape model composed of two parts. When the two parts are in contact with each other, a group of intersections between the surfaces is formed, and a surface having a loop formed by the group of intersections as an outline is set. The surface represents the joining of the two parts. As described above, the shape model has the boundary condition information that enables the shape operation for each part.

As described above, studies on the structure and the amount of information have been conventionally made so that CAD can easily handle the shape operation when handling the shape model. Each component has a structure for calculating a shape such as contacting or being inside. However, the object described is one shape model, and does not mention the relationship with another model.

For the boundary condition information and configuration of the shape model, see “Basics and Application of 3D CAD”, pp. 19-36 (edited by Hiroshi Toritani and Hiroaki Chiyokura, Kyoritsu Shuppan Co., Ltd., 19).
1991).

Details on the technique of model creation and input of shape attributes are described in the manual of I-DEAS of SDRC.

In such a situation, when performing analysis of a complicated structure or high-precision analysis, there are the following problems in changing the shape of a product in CAD.

Once a model has been created for one product, analysis is often performed by changing the shape of a certain portion or changing the components without changing all the shapes. Therefore, the shape of the model is used many times. However, every time the shape is changed, the user has to redo the change of the related components. This is because the components of the shape model are handled individually.

In the case of an analysis in which the steps of the overall analysis and the detailed analysis are performed while following the steps of the high-precision analysis, if the model at a certain stage is partially changed, it is necessary to divide the elements again. Therefore, even in the common part, the node number changes. This is because past data is not stored and used. An adverse effect of changing the node number is to display an analysis result. A general post processor includes an item called node display. At this time, when comparing a plurality of analysis results, a common part is often compared. If it is a point other than the changed part, it is easier to compare it if it is the same as the past node. The boundary condition is set again with the change, because the past data is not inherited.

[0017]

In the prior art, when a shape model to be analyzed is input and a whole model and a detailed model are analyzed, there is a change in either of them, and the affected part is included in both. In any case, it is necessary to change the shape. In this case, individual data must be corrected on the shape model, which is a troublesome operation. Also, as the structure became more complex and the number of components increased, the work was more troublesome and more careful.

Further, when the size of an analysis target is changed, or when a designer or another user creates a new one, the existing data may not be used and a new one may be created.

In addition, when a point to be focused on most is changed, or when it is desired to see a behavior close to reality by adding a part that has been omitted, or when an element of the most focused point is re-divided,
You may want to see the details. In this case, there is a problem in that a change in shape and dimensions or addition of another part becomes a problem, and analysis must be performed again from the beginning.

Further, when a part is added to a model that has already been analyzed, if the model is divided again into elements, the node numbers of the model are changed, and it is difficult to compare with the past analysis results. This is a problem caused by not reusing past data.

An object of the present invention is to provide a CA that can effectively use existing information among information on the shape of a model.
D / CAE apparatus is provided.

[0022]

In order to achieve the above object, the present invention creates a shape model of the analysis object based on information on the shape of the analysis object and the analysis conditions, and creates a plurality of finite shape models. In a CAD / CAE apparatus that divides an element into elements to create a finite element model, analyzes the created finite element model according to analysis conditions, and outputs the analysis result as the behavior of the analysis target, the designated component of the analysis target Input means for inputting shape change information to the input device; shape changing means for changing the shape of a finite element model related to the specified component to be analyzed according to the shape change information input by the input means; Information storage means for storing information on the finite element model whose shape has been changed and the finite element model obtained from the shape model; While maintaining mutual consistency between the region affected by the shape change and at least the region not affected by the shape change in the finite element model whose shape has been changed by the shape changing means based on the obtained information. A finite element model creation means for creating a new finite element model; and analysis processing means for analyzing and processing the finite element model newly created by the finite element model creation means according to analysis conditions. Is a CAD / CAE apparatus.

In configuring the CAD / CAE apparatus, the finite element model generating means can be configured by one having the following functions.

(1) Initializing only the area affected by the shape change in the finite element model whose shape has been changed by the shape changing means based on the information stored in the storage means, The initialized region is again divided into a plurality of finite elements, and a new finite element model is created, while maintaining mutual consistency with at least the uninitialized region.

(2) Initialize only the area affected by the shape change in the finite element model whose shape has been changed by the shape changing means based on the information stored in the storage means and at least the area not initialized. Using the existing information as information, the initialized area is again divided into a plurality of finite elements to create a new finite element model.

(3) In the finite element model whose shape has been changed by the shape changing means based on the information stored in the storage means, the area whose shape has been changed and the area in the vicinity thereof are initialized and initialized. The initialized region is again divided into a plurality of finite elements to create a new finite element model, while maintaining mutual consistency between the initialized region and at least an uninitialized region.

(4) Initialize, and at least initialize, the area of the finite element model whose shape has been changed by the shape changing means based on the information stored in the storage means and the area in the vicinity of the changed area. Using the existing information as information on the region not to be initialized, the initialized region is again divided into a plurality of finite elements to create a new finite element model.

Also, the present invention provides a method of forming a shape model of an analysis object based on information on a shape of an analysis object and analysis conditions, and dividing the shape model into a plurality of finite elements to create a finite element model. The CAD / CAE apparatus that analyzes the created finite element model according to the analysis conditions and outputs the analysis result as the behavior of the analysis target creates an overall model simulating the shape of the entire analysis target based on the shape model. An overall model creating unit, a detailed model creating unit that creates a detailed model simulating a part of the shape of the analysis target based on the shape model, and inputting shape change information for the components belonging to the overall model and the detailed model. Input means to be changed, and a change is required among constituent elements belonging to the entire model and the detailed model according to the shape change information input by the input means. Designating means for designating a component and other components; shape changing means for changing the shape of a component specified as a component requiring change by the command means; and shape changing by the shape changing means. Shape changing means for changing the shape of the shape model related to the component,
A finite element model creating means for creating a finite element model based on the shape model whose shape has been changed by the shape changing means; and analyzing and processing the finite element model created by the finite element model creating means according to analysis conditions. This constitutes a CAD / CAE apparatus having analysis processing means.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a CAD / system showing one embodiment of the present invention.
FIG. 1 is an overall configuration diagram of a CAE device. In FIG.
The / CAE device includes an analysis processor 10, a display unit 12, a keyboard 14, and a database 16. The keyboard 14 is configured as input means for inputting data relating to the shape, analysis conditions, commands, shape change information, and the like of a plurality of components (parts) constituting an analysis target in response to an operation of the operator. The display unit 12 is configured as a display unit (output unit) that displays an image in accordance with data input from the keyboard 14 and displays a calculation result (analysis result) of the analysis processor 10 and the like. When information such as a shape to be analyzed and analysis conditions is input from the keyboard 14, the analysis processor 10 generates a shape model (physical model) including a phase element based on the data stored in the database (information storage unit) 16. Model), a finite element model (mathematical model) is created, and the created finite element model is analyzed. Specifically, the analysis processor 10 includes a shape input unit 18, a shape change unit 20, a shape processing unit 22, a finite element model creation unit 2
4, an analysis processing unit 26, and an analysis result display unit 28. Each unit is connected to the display unit 12 and to the database 16. As shown in FIG. 2, the shape input unit 18 includes a geometric data input unit 30, a material data input unit 32, and an analysis condition input unit 34. The database 16 is, as shown in FIG.
The data storage areas are the entire shape data storage unit 36, the detailed shape data storage unit 38, the material data storage unit 40, the entire finite element data storage unit 42, and the detailed finite element data storage unit 4.
4, divided into an overall analysis result data storage unit 46 and a detailed analysis result data storage unit 48. The geometric data input unit 30 receives the geometric data among the data related to the shape to be analyzed, and the material data input unit 32 receives the data related to the material among the data related to the analysis,
The analysis condition input unit 34 is configured to input data relating to the analysis conditions. The shape changing unit 20 is configured to specify a component to be changed by an operator (user) for a plurality of components to be analyzed input to the shape input unit 18. The shape processing unit 22 includes the shape changing unit 2
For the part (analysis target) for which the shape of the component specified by 0 is to be changed, the part and the component related to the part are changed, and the past data is converted while maintaining consistency with the existing data. Inherit processing is performed. The shape processing unit 22 creates a finite element model by dividing a shape model related to each component into a plurality of finite elements (elements). The analysis processing unit 26 analyzes the finite element model based on the analysis conditions. The analysis result processing unit 28 displays the analysis result processed by the analysis processing unit 26 on the screen of the display unit 12.

In the above configuration, when analyzing the behavior of the object to be analyzed, when information on the shape of the object to be analyzed is input from the keyboard 14, data relating to the shape is input to the shape input unit 18. Then, geometric data is generated based on the input shape data, and the geometric data is stored in the entire shape data storage unit 36 and the detailed data storage unit 38, respectively. After the geometric data of the shape model is generated, when the material constants relating to the components of the shape model are input by operating the keyboard 14, these input data are generated as the material data in the material data input unit 32. This material data is stored in the material data storage unit 40.

Next, when the analysis conditions required for the analysis are inputted from the keyboard 14, the analysis condition data is generated in the analysis condition input section 34, and the analysis condition data is stored in the whole shape data storage section 36 and the detailed data shape. Each is stored in the storage unit 38.

On the other hand, regarding the shape change, the keyboard 1
The data input based on the operation 4 is processed by the shape changing unit 20. If this data is a whole model, this data is stored in the whole shape data storage unit 36, and if it is a detailed model, this data is stored in the detailed shape data storage unit 38
Is stored in The individually stored data is processed by the shape processing unit 22.

On the other hand, when processing for creating a finite element model for the input shape model is performed by the finite element model creation unit 24, this data is stored in the entire finite element data storage unit 42 and the detailed finite element data storage unit. Each is stored in the unit 44. These data are sent to the analysis processing unit 26.
The data relating to this analysis result is stored in the overall analysis result data storage unit 46 and the detailed analysis result data storage unit 48, respectively. The data based on the analysis result is converted into image data by the analysis result display unit 28,
The analysis result is displayed as an image on the screen of the display unit 12.

When analyzing the behavior of the object to be analyzed by the processing of the analysis processor 10, as shown in FIG. 3, processing for element division and consistency is performed. First, a shape model to be analyzed is created based on information on the shape to be analyzed and the analysis conditions (step S1). Then, for the created shape model, as shown in FIG. 4, the shape model is divided into a plurality of finite elements Ei to create a finite element model M1, and the finite element model M1 is analyzed according to the analysis conditions. The result is displayed as an image as the behavior to be analyzed. When a new part is added from the analysis result to the finite element model M1, for example, as shown in FIG.
When 1 is added (step S2), initialization is performed on the finite element near the area to which the component P1 has been added (step S3). That is, as shown in FIG. 6, a plurality of finite elements near the part P1 are initialized with the part where the part P1 is added as an evaluation point, and the other finite elements are left as they are. At this time, as shown in FIG. 7, the initialized part of the finite element model M1 is again divided into a plurality of finite elements while maintaining consistency between the initialized part (region) and the uninitialized part. (Steps S4 and S5). In this case, the contact numbers of the uninitialized parts are displayed as they are using the original numbers, and the new contact numbers of the newly added parts are displayed with the new contact numbers.

That is, when a changed part and its contents are specified in the created finite element model, a region including the finite element affected by the change among the finite elements of the finite element model is initialized, and The initialized area (part) is divided into a plurality of finite elements while maintaining mutual consistency between the finite element belonging to the initialized area and the finite element belonging to the uninitialized area, and obtained by subdivision. A new finite element model is created based on the set finite element and the uninitialized finite element. Then, the behavior of the analysis target is analyzed based on the newly created finite element model.

As shown in FIGS. 8 and 9, after the shape model is divided into a plurality of finite elements to create a finite element model M2, points indicated by arrows are used as evaluation points, and as shown in FIG. When it becomes necessary to add the component P2 to a specific area (portion), as shown in FIG. 11, a boundary condition is set at the contacts T1 to T13 by a user operation, and a contact number and a boundary condition of this portion are set. Is kept constant, and the contact numbers of the finite elements belonging to the region other than the vicinity of the component P2 are left as they are, and the process for changing the contact numbers of the finite elements belonging to the region near the component P2 is performed. Do. That is, only the area near the component P2 is initialized,
The initialized area (part) is again divided into a plurality of finite elements to create a new finite element model.

In this embodiment, the contact number of the evaluation point is not changed. This is because, in the structural analysis, the shape of the product is evaluated based on the stress at the evaluation point, so that when the position of the evaluation point changes, the evaluation criterion changes, which is not appropriate in terms of strength evaluation.

As described above, in the present embodiment, when a finite element model is created from a shape model, when a new part is added to the finite element model, only the area near the new part is initialized, and other parts are initialized. Since the area remains as it is, past (existing) data can be used as data relating to the area that is not initialized, and past data can be used effectively.

Next, an embodiment in which a whole model and a detailed model are created from a shape model simulating the shape of an analysis target to analyze the behavior of the analysis target will be described with reference to FIGS.

The overall model M3 has ten constituent elements 201.
The detailed model M4 includes three components 211, 212, and 213 as elements corresponding to the hatched portion 222 of the overall model M3. As shown in FIGS. 14 and 15, the following data is set for each of the components 201 to 210 and the components 211 to 213.

(A) Geometric data representing the form of coordinates, curved surfaces, straight lines, etc. (b) Data on materials (c) Data on analysis conditions (d) Data showing the relationship with other model components (for the entire model) (E) Relationship with detailed model) (e) Data for determining change or fixation Here, (d) is stored in shape data storage units 36 and 38 by shape change unit 20,
The process for this attribute is retrieved and retrieved from the attribute data storage. For example, if the component 201 of the overall model M3 matches or is modeled as the component 211 of the detailed model M4, the user specifies it as the same component. By doing so, the detailed model M4
Has data indicating that it is related to the component 211 of FIG. Then, when there is a change in either model, another model can be automatically changed using this data.

(E) is data representing change or fixation of a component.

The eight constituent elements 202 to 202 have the same material and the same shape, and differ only in the coordinates. Therefore, these portions can be regarded as a repeating structure. Therefore, in the present embodiment, a detailed model of this portion is generated by focusing on the repetitive structure of the shape model.

Next, the operation of the present embodiment will be described with reference to the flowchart of FIG.

First, when data relating to the shape to be analyzed is input by operating the keyboard 14, a shape model simulating the shape to be analyzed is created by the processing of the analysis processor 10 (step S11). Next, when the user inputs material constants to the shape model (step S1)
2) This data is input to the analysis processor 10.
Thereafter, the entire model M3 and the detailed model M4 are created based on the input data, and the same component among the components of the general model M3 and the detailed model M4 is designated (step S13). Next, a component that is not changed among the components of the overall model M3 and the detailed model M4 is specified (step S14). Next, when a part of the shape model is changed, a component to be changed is designated (step S15). For example, when changing the component 212 of the detailed model 14, as shown in FIG. 17, the component 212 is selected, and the change content for changing the length of the component 212 in the Z direction is input. For example, the length of the component 212 in the Z direction is 2.0
Enter the information to make it longer in the change panel. At this time, when the component 213 needs to be fixed, data for fixing is input to the component 213 as shown in FIG.

Next, the shape model related to the components of the shape model whose shape has been changed is changed (step S).
16). For example, as shown in FIG.
When the length of the component 212 is increased in the Z direction, as shown in FIG.
Increase the length of 02 to 209. As a result, the component 201 is changed from the position indicated by the dotted line to the position indicated by the solid line.

After the shape model change processing is completed,
The changed shape model is divided into a plurality of finite elements to generate a finite element model (step S17). The behavior of the analysis target is analyzed based on the generated finite element model (step S18), and the analysis result is displayed as an image.
Then, the user determines whether or not the analysis result displayed on the image is satisfactory. If the result is good, the process in this routine is ended. If the result is not satisfactory, the process returns to step S14. .

According to the present embodiment, when performing the whole analysis and the detailed analysis of the shape model, the user designates the change and fixation of the constituent elements for the whole model and the detailed model composed of a plurality of constituent elements. Thus, the entire model and the detailed model can be changed, and the user's effort in creating the model can be reduced.

[0050]

As described above, according to the present invention,
When changing the model, only the area to be changed is initialized, and the other areas retain the original state and the model is changed, so existing information among the information on the model shape must be used effectively. And the shape can be changed efficiently.

Further, according to the present invention, when performing the whole analysis and the detailed analysis, the change and fixation of the constituent elements are designated for the whole model and the detailed model including a plurality of constituent elements, and the change of the constituent elements is performed. To do
The labor required for model creation can be reduced.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a graphic analysis processing apparatus according to an embodiment of the present invention.

FIG. 2 is a specific configuration diagram of an analysis processor and a database.

FIG. 3 is a flowchart for explaining the operation of the device shown in FIG. 1;

FIG. 4 is a configuration diagram of a finite element model.

FIG. 5 is a diagram showing a state when a component is added to a finite element model.

FIG. 6 is a diagram illustrating a state when a part of a finite element model is initialized.

FIG. 7 is a diagram showing a state when a model to which a component is added is divided again into a plurality of components.

FIG. 8 is a diagram showing another embodiment of the shape model.

FIG. 9 is a diagram showing a state when a finite element model is formed from a shape model.

FIG. 10 is a diagram illustrating a state when a new component is added to the finite element model.

FIG. 11 is a diagram showing a state when a finite element model is created by dividing a model to which components are added again into a plurality of constituent elements.

FIG. 12 is a configuration diagram of an entire model.

FIG. 13 is a configuration diagram of a detailed model.

FIG. 14 is an explanatory diagram of a configuration of an entire model.

FIG. 15 is an explanatory diagram of a configuration of a detailed model.

FIG. 16 is a flowchart for explaining the operation of another embodiment of the present invention.

FIG. 17 is a diagram illustrating a display example when a component of a detailed model is changed.

FIG. 18 is a diagram illustrating a display example when fixing some components of the detailed model.

FIG. 19 is a diagram showing a state when the length of some components of the detailed model is changed.

FIG. 20 is a diagram illustrating a state in which the entire model is changed in accordance with a change in some components of the detailed model.

[Explanation of symbols]

 Reference Signs List 10 analysis processor 12 display unit 14 keyboard 16 database 18 shape input unit 20 shape change unit 22 shape processing unit 24 finite element model creation unit 26 analysis processing unit 28 analysis result processing unit

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Naoto Saito 502 Kunitachi-cho, Tsuchiura-shi, Ibaraki Pref. Machinery Research Laboratory, Hitachi Ltd. (72) Toshitada Nezu 1-Horiyamashita, Hadano-shi, Kanagawa Pref. General Computer Division (72) Inventor Tatsuka Sakamoto 1 Horiyamashita, Hadano-shi, Kanagawa Prefecture Hitachi Computer Co., Ltd. (72) Inventor Takashi Takahashi 456 Nakai-cho, Nakaicho, Ashigara-gun, Kanagawa Prefecture Hitachi Information Technology Co., Ltd. (72) Inventor Nobuyoshi Yanagita 502 Kandachi-cho, Tsuchiura-shi, Ibaraki Pref. Machinery Research Laboratories, Hitachi, Ltd.

Claims (6)

[Claims] 1. A shape model to be analyzed is created based on information on a shape to be analyzed and analysis conditions, the shape model is divided into a plurality of finite elements to create a finite element model, and the created finite element model is created. In a CAD / CAE apparatus that analyzes a model according to analysis conditions and outputs the analysis result as behavior of the analysis target, input means for inputting shape change information for a specified component of the analysis target, and input of the input means Shape changing means for changing the shape of the finite element model related to the specified component to be analyzed according to the shape change information according to, and the finite element model whose shape has been changed by the shape changing means and obtained from the shape model. Information storage means for storing information related to the finite element model; and a shape changing means for changing the shape by the shape changing means based on the information stored in the storage means. A finite element model creating means for creating a new finite element model while maintaining mutual consistency between the region affected by the shape change and at least the region not affected by the shape change in the finite element model An analysis processing means for analyzing and processing a finite element model newly created by the finite element model creation means in accordance with analysis conditions. 2. A shape model to be analyzed is created based on information on a shape to be analyzed and analysis conditions, the shape model is divided into a plurality of finite elements to create a finite element model, and the created finite element model is created. In a CAD / CAE apparatus that analyzes a model according to analysis conditions and outputs the analysis result as behavior of the analysis target, input means for inputting shape change information for a specified component of the analysis target, and input of the input means Shape changing means for changing the shape of the finite element model related to the specified component to be analyzed according to the shape change information according to, and the finite element model whose shape has been changed by the shape changing means and obtained from the shape model. Information storage means for storing information related to the finite element model; and a shape changing means for changing the shape by the shape changing means based on the information stored in the storage means. Initializing only the area of the finite element model affected by the shape change, while maintaining mutual consistency between the initialized area and at least the uninitialized area, the initialized area Finite element model creating means for creating a new finite element model by dividing the finite element model into a plurality of finite elements again, and analyzing and processing the finite element model newly created by the finite element model creating means according to the analysis conditions. A CAD / CAE apparatus, comprising: processing means. 3. A shape model to be analyzed is created based on information on a shape to be analyzed and analysis conditions, the shape model is divided into a plurality of finite elements to create a finite element model, and the created finite element model is created. In a CAD / CAE apparatus that analyzes a model according to analysis conditions and outputs the analysis result as behavior of the analysis target, input means for inputting shape change information for a specified component of the analysis target, and input of the input means Shape changing means for changing the shape of the finite element model related to the specified component to be analyzed according to the shape change information according to, and the finite element model whose shape has been changed by the shape changing means and obtained from the shape model. Information storage means for storing information related to the finite element model; and a shape changing means for changing the shape by the shape changing means based on the information stored in the storage means. Initializing only the area affected by the shape change in the finite element model that has been initialized and using existing information as information on at least the uninitialized area, the initialized area is again divided into a plurality of finite elements. A finite element model creating means for creating a new finite element model, and an analysis processing means for analyzing and processing the finite element model newly created by the finite element model creating means according to analysis conditions. CAD / CAE apparatus characterized by the above-mentioned. 4. A shape model to be analyzed is created on the basis of information on a shape to be analyzed and analysis conditions, and the shape model is divided into a plurality of finite elements to create a finite element model. In a CAD / CAE apparatus that analyzes a model according to analysis conditions and outputs the analysis result as behavior of the analysis target, input means for inputting shape change information for a specified component of the analysis target, and input of the input means Shape changing means for changing the shape of the finite element model related to the specified component to be analyzed according to the shape change information according to, and the finite element model whose shape has been changed by the shape changing means and obtained from the shape model. Information storage means for storing information related to the finite element model; and a shape changing means for changing the shape by the shape changing means based on the information stored in the storage means. Initializing only the region whose shape has been changed and the region in the vicinity of the modified finite element model, and maintaining the mutual consistency between the initialized region and at least the uninitialized region, A finite element model creating unit for creating a new finite element model by dividing the region into a plurality of finite elements again, and analyzing the finite element model newly created by the finite element model creating unit in accordance with the analysis conditions. A CAD / CAE apparatus comprising: an analysis processing means for processing. 5. A shape model to be analyzed is created based on information on a shape to be analyzed and analysis conditions, and the shape model is divided into a plurality of finite elements to create a finite element model. In a CAD / CAE apparatus that analyzes a model according to analysis conditions and outputs the analysis result as behavior of the analysis target, input means for inputting shape change information for a specified component of the analysis target, and input of the input means Shape changing means for changing the shape of the finite element model related to the specified component to be analyzed according to the shape change information according to, and the finite element model whose shape has been changed by the shape changing means and obtained from the shape model. Information storage means for storing information related to the finite element model; and a shape changing means for changing the shape by the shape changing means based on the information stored in the storage means. Initialize only the area whose shape has been changed and the area in the vicinity of the changed finite element model, and use the existing information as information on at least the area that is not initialized. A finite element model creating means for creating a new finite element model by dividing into elements, and an analysis processing means for analyzing and processing the finite element model newly created by the finite element model creating means according to analysis conditions. A CAD / CAE apparatus characterized in that: 6. A finite element model is created based on information on the shape and analysis conditions of the analysis object, and the shape model is divided into a plurality of finite elements to create a finite element model. In a CAD / CAE apparatus that analyzes a model according to analysis conditions and outputs the analysis result as behavior of the analysis target, an overall model creating unit that creates an overall model simulating the shape of the entire analysis target based on the shape model And a detailed model creating means for creating a detailed model simulating a part of the shape of the analysis target based on the shape model, and input means for inputting shape change information for components belonging to the whole model and the detailed model. A component that needs to be changed among components belonging to the whole model and the detailed model according to shape change information input by the input means; A designating means for designating an external component, a shape changing means for changing a shape of a component specified as a component requiring change by the command means, and a shape changing means for changing the shape of the component by the shape changing means. Shape changing means for changing the shape of the shape model to be formed, finite element model creating means for creating a finite element model based on the shape model whose shape has been changed by the shape changing means, and a finite element model created by the finite element model creating means. Analysis processing means for analyzing and processing the finite element model according to the analysis conditions.